Alfred t



(No Modl.) A. BROWN.

GONTROLLINGDBVIUE FOR ELEVATOM.

,67'7. Paltented Jan. 16,1894.

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ms NATIONAL UNITED STATES ATENT f rica;

ALFRED T. BROWVN, OF CINCINNATI, OHIO, ASSIGNOR TO THE WARNER ELEVATORMANUFAC'IURING COMPANY, OF SAME PLACE.

CONTROLLING DEVICE FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 512,677, dated January16, 1894.

Application filed September 28, 1893. Serial No. (N0 model To to whom itmay concern:

Be it known that I, ALFRED T. BROWN, a citizen of the United States, anda resident of Cincinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvements in Controlling Devicesfor Elevators, of which the following is a specification.

The object of my invention is to provide a controlling device forelevators, whereby the active sheaves may be placed in any convenientposition about the cab within the hatchway or shaft, and have theirframes or bearings disconnected from the cab or motor mechanism, wherebythey may have a greatly increased movement and also permit the use oflarge sheaves, thereby diminishing the wear upon the shipper ropes.

In controlling devices of the character to which myinvention relates,theshipper ropes have usually been passed over movable sheaves supported inbearings connected to the cab or some part of the motor controllingmechanism, which arrangement admits of only a limited play of the activesheave or sheaves, while in my device the active sheaves are mounted inframes or bearings which are in no manner fixed to the cab or motorcontrolling mechanism, and may therefore be moved as far as desired.

Theinvention will be fully understood from the description of theaccompanying drawings, in which- Figure 1 is a side elevation of acabhaving my controlling device attached. Fig. 2 is an inverted plan viewof the cab. Fig. 3 is a detailed view in vertical section, taken axiallythrough the pilot wheel, which is inside of the cab and shown in dottedlines, Fig. 1. Fig. 4. is a detailed view in vertical section throughthe bottom of the cab. In this view the fixed and movable sheaves arearranged underneath the cab, and the view is taken 'on line a: no ofFig. 5. Fig. 5 is an inverted plan View of the arrangement shown in Fig.4. Fig. 6 is a detailed plan view of a sheave.

Referring to the parts, which are indicated by similar reference letterswherever they occur throughout the various views, A represents the cab,Bthe fixed idle sheaves mounted in suitable bearings, which are securedto the top of the cab as shown in Figs. 1 and 2, and to the bottom ofthe cab, as shown in Figs. 4 and 5, and C are the movable sheavesmounted in frames or hangers c, the cross arms of which extend over theedges of the sheaves C toretain the shipper ropesD in place on themovable sheaves.

When the controlling device is arranged at the side of the cab, as shownin Figs. 1 and 2, the shipper ropes D, which have their upper endssecured to the upper cross timbers of the well (not shown), pass downunder the movable sheaves C, thence up over the fixed idle sheaves B,and thence down to the valve gear or other motor controlling mechanism.In the present instance, the ropes pass under guide pulleys E and aroundthe shifting wheel F.

It is not necessary to more specifically describe the means ofconnecting the ends of the shipper ropes and the valve gear or the motormechanism, as neither the valve gear nor-motor mechanism forms any partof my present invention, nor is it material whether the ropes be singleand secured to the wheel F, or whether there be two ropes having theirlower ends secured to the motor wheel, lever or other actuating device.The auxiliary ropes G are connected to the sheave frames 0 at one end,thence pass down through the bottom of the cab over guide pulleys g,thence parallel with the bottom of the cab over similar guide pulleys g,thence up through the bottom of the cab to the rope drum h of the pilotwheel H, to which drum the ropes are secured, one passing around it inone direction and the other in the opposite direction, so that byturning the wheel to draw upon one of the sheaves and tighten theshipper rope, the opposite sheave is released, and the shipper rope, ofcourse, slackened.

In order to take up the slack of the shipper ropes, the upper end of oneof them may be wound around a drum journaled in a bearing at the top ofthe well. A ratchet wheel I is secured to said drum and engaged by apawl 15. Should the rope become slack, the drum is actuated by a weightJ to wind. up the rope I), and the pawl engaging the teeth of theratchet, prevents the rope from unwinding.

The arrangements shown in Figs. 4 and 5 are applicable to large cabs orplatforms.

The shipper ropes D, which pass around the sheave 0, pass under one andover the other fixed sheaves B; the end passing under one sheave extendsup to the top of the well, and the end which passes over the other,passes down to the mechanism which controls the any convenient positionto suit the space upon either side, front or back, of the well, and thatmany mechanical changes may be made without departing from the spiritand scope of my invention.

What I claim as new, and desire to secure by Letters Patent, is-

1. In an elevator controlling device, the combination of the cab, theshipper ropes fixed to the top of the well and to the motor controllingmechanism, idle pulleys journaled in bearings fixed to the cab, movablesheaves, said ropes passing around said pulleys and sheaves, the shippermechanism under the control of the operator, guide wheels mounted inbearings fixed to the. cab, the auxiliary ropes passing around saidguide wheels and each connected at one end to one of the movable sheavesand at the opposite end to the shipper mechanism, substantially as shownand described.

2. The combination of the shipper ropes fixed to the top of the well,and connected at the bottom of the well to the stopping and startingmechanism of the motolgidle pulleys journaled in bearings fixed to thecab, movable sheaves, said ropes passing around said pulleys andsheaves, the pilot wheel within the cab, guide pulleys journaled inbearings fixed to the cab, and the auxiliary ropes connected at one endto the movable sheaves, passing around said guide pulleys, and connectedat its opposite ends to said pilot wheel, substantially as shown anddescribed.

3. The combination substantially as hereinbefor e set forth of the cab,the motor controlling mechanism, idle pulleys j ournaled in bearingsfixed to the top of the cab, movable sheaves, the shipper ropes fixed tothe top of the well passing around said pulleys and sheaves andconnected to the motor controlling mechanism, the pilot wheel and drummounted upon a stud within the cab, guide wheels journaled on bearingsfixed to the cab, and the auxiliary ropes connected at one end to themovable sheaves passing around said guide pulleys wound in oppositedirections around the pilot wheel drum and connected thereto, wherebyone of said shipper ropes is tightened and the other slackened by therevolution of the pilot wheel.

4:- In an elevator controlling mechanism, the combination of the cab,the ratchet drum journaled in bearings fixed to the top of the well, theidle pulleys journaled in bearings fixed to the cab, movable sheaves,the shipper ropes passing around said pulleys, sheave and ratchet drumone of said ropes having its up per end hanging below said drum and thelower ends of both ropes being connected to the motor controllingmechanism, weights suspended from the upper ends of one of said ropes,the shipper mechanism under control of the operator, guide wheelsmounted in bearings fixed to the cab, and the auxiliary ropes passingaround said guide wheels and each connected at one end to the movablesheaves and at the opposite end to the shipper mechanism, substantiallyas shown and described.

ALFRED T. BROWN.

Witnesses:

FRANK S. DAVIS, GEO. J. MURRAY.

